Cooling of inclosed dynamo-electric machinery.



Y P. AMSLER. COOLING ORINCLOSED DYNAMO ELECTRIC MACHINERY.

I Y I APPLIOATIN FILED MAB.. 27, i909, I A 953,574 y & Patented Mar. 29,1910.

' machines to use a casing for the machine closed Dynamo Electric ofblowing fresh air through the machine .without the provision of specialprojections difiicult to supply and exhaust air from -mass of airthroughv the machine and side the machine and shut cil1 from the sur@mann stramien PAUL 'MSLE'D., DE BADEN, SWITZERLAND, ASSIGR TOAKTIENGESELLSCEAFT BRGW'll-BOVERI & E., 0F BADEN, S/VITZERLAND. f

CDLNG- i 0F. NCLSED To all whom 'it may concern:

.Rmerstrasse, Baden, Switzerland, have in- ,i

vented certain new and useful Improvements in ,and Relatingto theCooling ot 'ln- 2 l ltl'achinery, of which the following is aspecification.

@This invention relates to the cooling of inlpsed dynamo electricmachinery.

"1t has heretofore been proposed in the matter of cooling incloseddynamo electric provided with ribs by which'the heat is transmitted tothe atmosphere and 'thus dissipated. Further, such an arrangement itmade, among which may be instanced that the air passing through supplyand exhaust channels placed in the foundations oi' the same.

The object of the present invention is to obtain an improved coolingarrangement or the like on the dynamo elect-ric machine which can alsobe used` 1n cases where it 1s outside Athrough special channels andexternal cooling apparatus as referred to above.

The invention is based on a device which1 is known per se, viz., tocirculate the same through a special cooling arrangement (reservoir,cooling coils or the like), placed outroundings?,y V

.- Essentiay ly the invention consists in constructing t e foundationsof the machine in such a manner that they can servelas a coolingIdevice. v

The invention is illustrated in the accom panying drawings in which-hFigure l is afsectional view thereof. Fig. 2 is an elevation partlyinxsecticn showing a modification, and Fig. 3 is a horizontalV sectionof another modification.

In the lform illustrated in Fig. l the machine is denoted by a, the'foundation plate by Z), the cooling apparatus by c, and the' foundationby f. The inode of` operation of this form isas follows :hly means o aSpecification of Letters 'Patent Application tiled March 27, 3.909.Serial No. 486.165.

DYNAMQ-ELECTRIC MACHINERY.

fan g placed on the rotor shaft il. and inf. side the machine, or elseby means of the ventilating action of the rotor itself, the air.

Patented Mar. 29, i919.'

is sucked in at c and exhausted at d. The

lair isI thus driven between the ribs e and gives up its heat to thelatter. This heat is l distributed over the foundation; plate 'andyfinally disappears yinto the immediately adjoining foundation (concreteetc). The ribs e may as shown in Fig. l be made hollow and either waterorfresh air circulated through them. A cooling coil may moreover beplacediu' the foundation plates, as shown in Fig,` 3 in which thefoundation plate b alone is shown having fluid educt at.c,'and an inductat (Z, cooling ribs e, in this case not hollow, and a cooling coil y",through which water or other cooling medium may be circulated. A

ln Fig. 2 is shown an arrangement in which there are neither hollow ribsnos1 is" there a cooling coil, the electric machine being` shownat a,foundation plate at the Aimbricated cooling ribs at e, the air educt atc and the induct atd, the Ventilating means consisting as in F ig. l ofa fan upon he rotor shaft or the. rotor acting as ventiator.

ABO

T he main advantage of the arrangement according to the presentinvention consists in this, that the same dimensions used for machinesw-hich are not in'closed. can he adhered to, for it is woll known thathitherto the dimensions of a machine had to be considerably increasedwhen provided 'with a case, in order to be able to cope with theexceptionally large quantity of heat generated. Hence it will be that bymeans oi. the present im'ention such inclosed ina' vchines can be fully`utilized in accordance with their dimensions. The production of -themachine is consequently considerably simplified, since t'or all cases inwhich inclosed machines arespecied, the same design can be usedthroughout and thus ribbed casings as well as air admission and exhaustchannels which are diiicult to construct are rendered superluous.

' Thel present device insures 'greater safety in comparison with otherarrangements where water cooled casings with outside and inside ribs areused, and in which burning out of the windings is likely to occur due to4 the condensing moist-ure.

Having now described my invention whatftl-f;

